Add ruby-graphql

Author: tb

.gitignore

@@ -17,3 +17,4 @@
 .byebug_history
 .idea/
 public/
+node_modules/

Gemfile

@@ -31,6 +31,9 @@ gem 'devise_token_auth'
 gem 'cancan'
 gem 'rolify'
 gem 'pry'
+gem 'graphql'
+gem 'graphiql-rails', group: :development
+gem 'graphql-batch'
 
 group :development, :test do
   # Call 'byebug' anywhere in the code to stop execution and get a debugger console
@@ -48,6 +51,3 @@ group :development do
   gem 'spring'
   gem 'spring-watcher-listen', '~> 2.0.0'
 end
-
-# Windows does not include zoneinfo files, so bundle the tzinfo-data gem
-gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]

Gemfile.lock

@@ -65,6 +65,12 @@ GEM
       thor (~> 0.19.1)
     globalid (0.3.7)
       activesupport (>= 4.1.0)
+    graphiql-rails (1.4.1)
+      rails
+    graphql (1.6.3)
+    graphql-batch (0.3.3)
+      graphql (>= 0.8, < 2)
+      promise.rb (~> 0.7.2)
     i18n (0.8.1)
     jsonapi-resources (0.9.0)
       activerecord (>= 4.1)
@@ -88,6 +94,7 @@ GEM
       mini_portile2 (~> 2.1.0)
     orm_adapter (0.5.0)
     pg (0.20.0)
+    promise.rb (0.7.3)
     pry (0.10.4)
       coderay (~> 1.1.0)
       method_source (~> 0.8.1)
@@ -177,6 +184,9 @@ DEPENDENCIES
   factory_girl
   faker
   foreman
+  graphiql-rails
+  graphql
+  graphql-batch
   jsonapi-resources
   listen (~> 3.0.5)
   pg (~> 0.18)
@@ -188,7 +198,6 @@ DEPENDENCIES
   rspec-rails
   spring
   spring-watcher-listen (~> 2.0.0)
-  tzinfo-data
 
 BUNDLED WITH
    1.14.6

README.md

@@ -28,3 +28,11 @@ Demo user: [email protected] / Secret123
 ### Client
 
 Add list, edit and form components in `client/src/components/` based on one of existing.
+
+### [graphiql](http://localhost:3001/graphiql)
+        
+    {
+      categories {
+        name
+      }
+    }

app/controllers/graphql_controller.rb

@@ -0,0 +1,32 @@
+class GraphqlController < ApplicationController
+  def execute
+    variables = ensure_hash(params[:variables])
+    query = params[:query]
+    context = {
+      # Query context goes here, for example:
+      # current_user: current_user,
+    }
+    result = RailsJsonApiServerSchema.execute(query, variables: variables, context: context)
+    render json: result
+  end
+
+  private
+
+  # Handle form data, JSON body, or a blank value
+  def ensure_hash(ambiguous_param)
+    case ambiguous_param
+    when String
+      if ambiguous_param.present?
+        ensure_hash(JSON.parse(ambiguous_param))
+      else
+        {}
+      end
+    when Hash, ActionController::Parameters
+      ambiguous_param
+    when nil
+      {}
+    else
+      raise ArgumentError, "Unexpected parameter: #{ambiguous_param}"
+    end
+  end
+end

app/graphql/loaders/.keep

@@ -0,0 +1,6 @@
+RailsJsonApiServerSchema = GraphQL::Schema.define do
+  query(Types::QueryType)
+
+  # GraphQL::Batch setup:
+  use GraphQL::Batch
+end

app/graphql/mutations/.keep

@@ -0,0 +1,6 @@
+Types::CategoryType = GraphQL::ObjectType.define do
+  name "Category"
+  field :id, types.Int
+  field :name, types.String
+  field :created_at, types.String
+end

app/graphql/rails_json_api_server_schema.rb

@@ -0,0 +1,20 @@
+Types::QueryType = GraphQL::ObjectType.define do
+  name "Query"
+  description "The query root of this schema"
+
+  field :category do
+    type Types::CategoryType
+    argument :id, !types.ID
+    description "Find a Category by ID"
+    resolve ->(obj, args, ctx) { Category.find(args["id"]) }
+  end
+
+  field :categories do
+    type types[Types::CategoryType]
+    argument :id, types[types.ID]
+    description "Find Categories"
+    resolve ->(obj, args, ctx) {
+      args["ids"] ? Category.where(id: args["ids"]) : Category.all
+    }
+  end
+end

app/graphql/types/.keep

@@ -9,7 +9,7 @@
 require "action_mailer/railtie"
 require "action_view/railtie"
 require "action_cable/engine"
-# require "sprockets/railtie"
+require "sprockets/railtie"
 require "rails/test_unit/railtie"
 
 # Require the gems listed in Gemfile, including any gems

app/graphql/types/category_type.rb

@@ -1,4 +1,9 @@
 Rails.application.routes.draw do
+  if Rails.env.development?
+    mount GraphiQL::Rails::Engine, at: "/graphiql", graphql_path: "/graphql"
+  end
+
+  post "/graphql", to: "graphql#execute"
   mount_devise_token_auth_for 'User', at: 'auth'
   jsonapi_resources :categories
   jsonapi_resources :comments